Shop 4,464 Deals on Upper Receivers

CMMG MkG .45 ACP Banshee Fixed Ejection Upper Group Receiver 5in 1-16 Twist 0.578x28 TPI .750in Titanium

CMMG Upper Group Resolute Fixed Ejector 9mm 16.1in 1-10 Twist 1/2 X 28 TPI 25.3in Tungsten

CMMG Upper Group Resolute Mk4 .22Lr 16.1in 1-16 Twist 1/2 X 28 TPI 24in Charcoal Green

CMMG Upper Group Dissent Mk3 .308Win 16.1in Empire Profile Non-Threaded Coyote Tan

Mean Arms Bearing Delay AR-15 9mm 16in/14.5in Upper Receiver 1/2x28 Black

Jacob Grey Firearms Complete Upper Assembly AR-10 6.5 CM 20in 1-8 Twist 5/8x24 Thread Black

Jacob Grey Firearms Complete Upper Assembly 7.62x39 Caliber 10.5in 1-10 Twist Black

Spikes Tactical Upper 300BLK 16in w/ FDE MOE Handguards & FSP

Spikes Tactical Upper 300BLK 8.3in MP w/10in BAR2 & Barking Spider

Seekins Precision NX10 Complete Upper

CMMG DISSENT Upper Receiver 9mm 6.5in 1-10 Twist 1/2x28 Thread Zeroed Linear Compensator Titanium

CMMG DISSENT Upper Receiver Mk4 300BLK 6.5in 1-7 Twist 5/8x24 Thread Zeroed Linear Compensator Sniper Grey

CMMG 9mm Banshee Upper Group Receiver 5in 1-10 Twist 1/2 X 28 TPI 13.7in Sniper Grey

CMMG Mk3 6.5 Creedmoor Endeavor Upper Group Receiver 20in Titanium

CMMG Mkgs Banshee Upper Receiver Group .40 S&W 8in Armor Black

Wilson Combat Upper Complete Forged 5.56 NATO Ranger Mid Length 16in Round Q-Comp 1-8 Twist Black Black

CMMG Endeavor 300 MK4 Upper Black 6mm ARC 20 Barrel 10-Rounds Three Magazines

Radical Firearms Complete Upper Assembly 16in 12.7x42 .936 1/20 Twist 12in MHR M-LOK Panzer Brake Black

Radical Firearms AR-15 RF Upper Assembly 16in 7.62x39 4150V HBAR Contour 1/10 Twist 10in RPR M-LOK A2 Flash Hider Black

ABC RIFLE COMPANY AR-15 Custom Billet Modular Stripped Upper Receiver Black

ABC RIFLE COMPANY AR-15 .300 AAC Blackout Micro Pistol 5in Barrel Custom 5in Top Cut Custom M-LOK Handguard Complete Upper Receiver w/BCG And Charging

ABC RIFLE COMPANY AR9 9mm Luger Pistol 4in Barrel M-LOK Handguard Complete Upper Receiver w/BCG And Charging Handle Flat Dark Earth

ABC RIFLE COMPANY AR-15 .223 Remington/5.56x45mm NATO Pistol 10in Quadrail Handguard Complete Upper Receiver w/BCG And Charging Handle Black

ABC RIFLE COMPANY AR-15 .223 Remington/5.56x45mm NATO Micro Pistol 5in Barrel M-LOK Handguard Upper Receiver w/BCG And Charging Handle Olive Drab